Banco Central de São Tomé e Príncipe Exchange Rates Today & Official API

Official Banco Central de São Tomé e Príncipe rates for 16 Oct 2026: 1 USD = 21.859 STN, 1 GBP = 28.956 STN (1 EUR fixed at 24.5 STN). All 14 currencies published, history back to 2026, CSV/Excel download. Free JSON API for tax, audits, and compliant invoicing.

Banco Central de São Tomé e Príncipe official daily exchange rates as JSON: 14 currencies against the STN, history back to 2026. Latest table on every plan. Get your API key.

About Banco Central de São Tomé e Príncipe

Banco Central de São Tomé e Príncipe publishes a daily exchange bulletin for the dobra (STN): buying, selling and mid rates for 14 currencies and the SDR. The dobra has been pegged to the euro at 24.5 since 2010, so the euro line is fixed and the dollar, pound, yen, CFA franc, real and the rest move with the euro's crosses. The bulletin is the official rate for customs and tax purposes in São Tomé; the bank publishes the table in force only, so our archive builds forward from September 2026.

• Official website: www.bcstp.st
• Official rate publication: Boletim de Câmbio

Quick start

One request for the pair you need — USD to STN at the official Banco Central de São Tomé e Príncipe rate:

curl "https://allratestoday.com/api/v1/central-bank/bcstp/latest?source=USD&target=STN" \
  -H "Authorization: Bearer art_live_your_key"

What comes back — a real response built from the table in force (2026-10-16):

{
  "bank": "bcstp",
  "name": "Banco Central de São Tomé e Príncipe",
  "rate_date": "2026-10-16",
  "source": "USD",
  "target": "STN",
  "rate": 21.8594,
  "rate_type": "buy",
  "derived": false,
  "method": "published",
  "age_days": 0,
  "stale": false,
  "cadence": "daily",
  "disclaimer": "Official rates as published by the named central bank. On weekends/holidays the most recent published rate_date is returned."
}

Or the bank's full published table:

curl "https://allratestoday.com/api/v1/central-bank/bcstp/latest" \
  -H "Authorization: Bearer art_live_your_key"

The full-table response has the same envelope with every published row (first rows shown):

{
  "bank": "bcstp",
  "name": "Banco Central de São Tomé e Príncipe",
  "rate_date": "2026-10-16",
  "age_days": 0,
  "stale": false,
  "cadence": "daily",
  "rates": [
    {"base":"BRL","quote":"STN","type":"buy","value":4.3226},
    {"base":"BRL","quote":"STN","type":"middle","value":4.355},
    {"base":"BRL","quote":"STN","type":"sell","value":4.3874},
    {"base":"CAD","quote":"STN","type":"buy","value":15.3865},
    … 38 more rows
  ],
  "disclaimer": "Official rates as published by the named central bank. On weekends/holidays the most recent published rate_date is returned."
}

On paid plans, any historical date or a time series:

curl "https://allratestoday.com/api/v1/central-bank/bcstp/history?source=USD&target=STN&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-10-16)

Below is the current table from Banco Central de São Tomé e Príncipe, unmodified — what a call to /latest returns right now, with values STN per 1 unit of each currency:

Download this table: Excel (.xlsx) CSV (paid plan required)

Base	Quote	Type	Rate
BRL	STN	buy	4.3226
BRL	STN	middle	4.355
BRL	STN	sell	4.3874
CAD	STN	buy	15.3865
CAD	STN	middle	15.5019
CAD	STN	sell	15.6173
CHF	STN	buy	26.3299
CHF	STN	middle	26.5274
CHF	STN	sell	26.7249
CNY	STN	buy	3.267
CNY	STN	middle	3.2915
CNY	STN	sell	3.316
DKK	STN	buy	3.2776
DKK	STN	middle	3.3022
DKK	STN	sell	3.3268
EUR	STN	buy	24.5
EUR	STN	middle	24.5
EUR	STN	sell	24.5
GBP	STN	buy	28.9564
GBP	STN	middle	29.1736
GBP	STN	sell	29.3907
JPY	STN	buy	0.1384
JPY	STN	middle	0.1394
JPY	STN	sell	0.1404
NOK	STN	buy	2.3
NOK	STN	middle	2.3173
NOK	STN	sell	2.3345
SEK	STN	buy	2.1921
SEK	STN	middle	2.2085
SEK	STN	sell	2.225
USD	STN	buy	21.8594
USD	STN	middle	22.0233
USD	STN	sell	22.1873
XAF	STN	buy	0.0374
XAF	STN	middle	0.0376
XAF	STN	sell	0.0379
XDR	STN	buy	29.5976
XDR	STN	middle	29.5976
XDR	STN	sell	29.5976
ZAR	STN	buy	1.3203
ZAR	STN	middle	1.3302
ZAR	STN	sell	1.3401

Node.js / TypeScript client

A dedicated zero-dependency npm package wraps these endpoints — bcstp-exchange-rate:

npm install bcstp-exchange-rate

import { getRate } from 'bcstp-exchange-rate';

const pair = await getRate('USD', 'STN', { apiKey: 'art_live_...' });
console.log(pair.rate, pair.rate_date);

Zero dependencies, TypeScript types included, and it runs anywhere fetch exists — Node 18+, Bun, Deno, and edge runtimes.

Full reference — installation, all four functions, response shapes, error codes: bcstp-exchange-rate documentation.

Why use the official Banco Central de São Tomé e Príncipe rate?

When an auditor or tax office in São Tomé and Príncipe asks which rate you used, "the STN mid-market rate at 14:32" is not an answer — the official rate published by Banco Central de São Tomé e Príncipe for that date is. This API returns exactly those published figures, stamped with the bank's own rate_date; on weekends and holidays the most recent published table is returned, as compliance rules expect.

Pairs the bank doesn't print directly are resolved from its table (inverse or cross via STN) and explicitly flagged "derived": true — so what the bank printed and what was computed are never confused.

Endpoints

• GET /api/v1/central-bank/bcstp/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/bcstp/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/bcstp/history — time series, up to 5,000 rows (paid plans)
• GET /api/v1/central-bank/bcstp/availability — publication calendar: the dates the bank actually published (all plans)

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once per business day, so caching a published table locally makes a small quota go far.

Frequently asked questions

Is there an API for Banco Central de São Tomé e Príncipe exchange rates?

Yes — this one. Official daily STN rates as clean JSON, latest table on every plan including free.

How often does Banco Central de São Tomé e Príncipe update its rates?

New tables land once per business day — the API picks each one up shortly after Banco Central de São Tomé e Príncipe publishes it (latest: 2026-10-16).

Is this the official published table?

Yes — the rows are Banco Central de São Tomé e Príncipe's published figures, untouched, with the original publication date attached. Pairs the bank didn't print are computed and flagged derived.

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